Ratchet-wrench.



c. E. PEARSON.

.RATCHET WRENCH.

APPLICATION FILED Aue. 5. 191s.

1, 180,81 5. Patented Apr. 25, 1916.

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CARL El /[1L PEARSON, OF CAMAS, WASHINGTON.

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Specification of Letters Patent.

Patented Apr. 25, rare.

Application filed August 5, 1913. Serial No. 783,026.

To all whom it may concern Be it known that I, CARL EMIL PEARSON, a citizen of Sweden, residing at Camas, in the county of Clarke and State of Washing ton, have invented certain new and useful Improvements in Ratchetrenches, of which the following is a specification.

This invention relates to improvements in ratchet wrenches and its object is to produce a wrench of this class that is simple in construction and positive in operation.

With the foregoing and other objects in view the invention consists in the combination and arrangement of parts to be hereinafter fully described in the following specification, pointed out in the claim and illustrated in the accompanying. drawing which forms a part of said specification and in which- Figure 1 is a view of my improved wrench in elevation. Fig. 2 is a similar view, partly in section, in a position at right angles to the position of Fig. 1. Fig. 3 is a view of a portion of the wrench partly in section. Fig. 4 is a transverse section taken on line 44 of Fig. 2. Fig. 5 is a section taken on line 5-5 of Fig. 3.

Like reference characters indicate corresponding parts throughout the several views.

1 is the wrench handle operatively associated with a head 2 which is circular in cross section and which is formed with a longitudinal circular eccentric aperture 3 and through the said aperture the shank 4 extends and is projected into the handle 1 and there fastened by means of a pin or other suitable fastening means 5. The end of the head 2 remote from the handle is flared as shown in the drawing to afford working room for the pawls 6, 6 which are disposed partly within said head and pivoted as at 7, 7 in the bifurcated portion of said shank. One of the prongs 9 of the bifurcated portion of the said shank is projected to form a support for the transverse pin 10 upon which the ratchet's 11 and 12, having teeth reversely disposed with relation to each other, are disposed, each of said ratchets being adapted for engagement with one of the pawls 6, 6 whereby rotation of the ratchets in either direction may be effected. Upon one face of the ratchet 12 a stationary jaw 13 is disposed that is provided with guides 14: that are projected through apertures in the relatively movable jaw 15 which jaw is further provided with threaded apertured portions to engage the threaded portions of the adjust-ing screws 16 which also pass through the fixed jaw 13 and which are provided with collars 17 adjacent one side of said fixed jaw and with heads 18 adjacent the other side of said fixed jaw to retain the same in position. To loosen or tighten a nut with my wrench the jaws 13, 15 are adjusted to fit said nut and the head 2 rotated until one of the pawls 6 is locked in inoperative position as shown in Fig. 3 due to the eccentric opening in said head in which said pawls are disposed; the spring 8 will now move the working end of the free pawl into operative position so that it may engage the teeth of the ratchet and rotate the same in one direction thus turning the nut; to turn the nut in the opposite direction the wrench head 2 is moved in the opposite direction to its last movement until the head 2 will lock the pawl 7 shown free in Fig. 3 and release the pawl shown locked in that figure when the spring 8 will depress the working end of the freed pawl and permit it to be operated to rotate the ratchet and nut in the reverse direction.

What is claimed is A ratchet wrench, including a handle hav-v ing a shank extending beyond its outer end, said shank extending portion being bifurcated, one of the prongs of the bifurcation being longitudinally reduced, said shanleextending portion being laterally recessed, said shank being equipped with an outwardly flared rotatable head, the lateral recesses of said shanleextending portion and the outwardly flared surface of said head having their opposite walls eccentric to each other, thereby forming an eccentric working space or clearance to provide for an eccentrically rotatable action of said head. with respect to said shank, retractile centrally pivoted pawls arranged at right angles to the trend of said lateral recesses, the inner retractile ends of said pawls being resiliently connected together, and ratchet disks having oppositely beveled or pointed teeth as my own I have hereto afiixed my signahung in the reductlon of the reduced prong ture in the presence of two subscribing witof sald shank-extended portion, in alinenesses.

ment with said pawls, one of said ratchet C. EMIL PEARSON. disks being equipped with a fixed and a mov- Witnesses able jaw. v J. E. HANNY,

In testimony that I claim the foregoing FRED B. BARNES.

I Copies of this patent may be obtained for five cents each, by addressing the Commissioner 01' Patents.

Washington, D. c. 

